Method of operating metallurgical furnaces.



G. H. BENJAMIN.

METHOD OF OPERATING METALLURGICAL FURNACES.

AP PLIOATION FILED JUNE 17, 1911.

1,083,777. Patented July 30, 191-2.

2 SHEETS-SHEET 1. Fl G1.

G. H. BENJAMIN. 7 METHOD OF OPERATING METALLURGICAL FURNACES.

APPLICATION FILED JUNE 17, 1911.

1,083,777 Patented July 30,1912.

2 SHEETS-SHEET 2.

TIC-1:41.

With names iii-X firm/X UNITED STATES PA ENT onnron.

GEORGE ITILLARD BENJAMIN, OF NEW YORK, N Y.

innrnon or OPERATING METALLURGICAL summons.

Specification of lbetters Patent.

Application file d June 17,1911. Serial No. 633,738.

To all whom it may concern:

Be it known that I, GEORGE HILLARD BENJAMIN, a citizen of the United States,

residing at New York city, in the county operation described in the present applica-.

tion over that set forth in the patents mentioned, is found in the fact that instead of feeding the material into the top of the furnace tobe moved progressively downward from chamber to chamber until the bottom of the furnace is reached, provision is made for feeding the-'material to be acted upon intoanyoftthe chambers and then 'advanc-.

ing'it downward, thus permitting the-material to be primarily acted upon at any desired temperature. Further, instead of actingupon the material wholly by heat, as in the above mentioned patents, provision is made for introducing into any of the chambers such gases or fiuxing materials as may be useful or necessary to effect chemical reactions with the materials treated, at specific temperatures, thus bringing about metallurgical results which cannot be obtained by the methods of operation described in the patents mentioned.

The accompanying drawings will serve to illustrate such a construction as may beused to carry my improved method, of, operation into effect, in which-- Figure 1 is a vertical longitudinal section. Fig. 2 is a vertlcal transverse section on the line IIII' of Fig. 1. Fig. 3 is a "vertical transverse section on the line III-III of Fig. 1. F' 4= is a 101! 'tudinal section on the line ,V--IV of ig. 11. Fig. 5 is a view corresponding with the dampers that control the heating fines in a different position.

In th drawings,*-5 indicates'the furnace structure' 6,.grate; 1 7, combustion chamber. The combustion chamber 7 communicates through the horizontal flue 8, directlywith 'is located .under the hopper.

to Fig. .1.

the chimney flue 9,'and indirectly through thehorizontal flues 10, 11, 12, 13, 14, and

vertical fiues 15, 16, with the chimney flue 9..

Located in theflues are dampers or valves 17, by manipulating which the direction of the hot air current may be regulated.

Located at one side of the furnace, aregas and air pipes 18 and 19, through which gas and a1r in a mingled condition may be fed to the horizontal flues 8, 10, 11, 12, 13,

Patented July 30,1912.

14, through the instrument-alityof burners 20, the ingress of the gas and air being controlled by valves 21, 22. Preferablythe gas and air is under pressure. By manipulating the dampers 17, any of the, treating chambers .A, B, C,-D, E, F, may be isolated.

The treating chambers are disposedbetween the heating flues, and connected to each treating chamber alternately on opposite sides of the furnace,.fare hoppers 25, provided Xiith a rotary'valve 26. A pusher, 27 Only four hoppers are shown corresponding to four chambers. Ahopper, however, maybe used in connection with each chamber. The operation of the hoppers and pusher are-wellunderstood, and no description is necesssary;

exhaust .pump 5 30. which is connected through its induction orifice to a pipe 31,

Located on one side of the furnace, is au itself connected through branch pipes 32 to treating chambers A, B, C, D, EyF. Each of the branch pipes 32 is provided with a r valve 33, so that the pump :30 may act on any one or all of the chambers as desired.

35- indicates a gas pump, connected through its induction orifice with a pipe 36, from which lead branch pipes 37, 38, 39, 4.0,

to sources of gas which may vary, as for instance, a source of oxygen, hydrogen, chlorin, cyanogen, acetylene, or a source of a pulverized product or bodies, such for instance as carbon, lime, calcium carbid, cal- 3,

cium fluorid, magnesia, or any other. y which may be employed to produce chemi cal reactions alone or in connection with a gas or gases, when brought into contact with the ore in any chamber at any required temperaturefi Suitable valves 41 are provided in the branch pipes. The eduction orifice of the gas ump 35 is connected to a pipe 42 connecte by branch pipes 43 to the treating chambers A, B, C E, F. 44-ind1cates suitable valves in these pipes.

e The treatingf'c-hambers- A, B, Q, E, F,

I to form secondary products,

such as salt to form soda, the production of bodies derived from lead and zinc, conversion of sulfur into commercial products, hosphoric acid with lime to form a fertifizer, and other uses too numerous to mention, and which will readily appeal to industrial chemists.

Having thus described my invention, I claim:

1; The herein described method of operating a metallurgical furnace, which consists in char ing the material to be treated into a cham er, subjecting it to a defined initial temperature for a definite time, exhausting the evolved gases, and introducing a combining body into such chamber.

2. The herein described method of operating a metallurgical furnace, which consists in charging the material to be treated into a chamber, subjecting it to a defined initial temperature for a definite time, exhausting the evolved gases, subjecting it to a different temperature for a definite time, and introducing a body which will combine at such change of temperature.

3. The herein atirg a metallurgical furnace, which condescribed method of oper-- sists in charging the material to be treated into a closed chamber, subjecting it to a defined initially applied temperature for a definite time, exhausting the evolved gases from saidichamber, subjecting it to a change of temperature for a definite time, and introducing a body which will combine with the material in such closed chamber at such change of temperature.

4. The herein described method of operating a metallurgical furnace, which consists in charging the material to be treated into a chamber having an initially defined temperature, progressively feeding said material into successive chambers heated to higher temperatures, exhausting the evolved gases from said chambers, and subjecting the material to the action of introduced bodies in'such of said chambers Where the temperature conditions are those which will effect the desired chemical combination.

In testimony whereof, I aflix my signature, in the presence of two Witnesses.

GEORGE HILLARD BENJAMIN. Witnessesz' HELEN E. Konnsori, ELI. S. WEILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

